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Damage modeling of ballistic penetration and impact behavior of concrete panel under low and high velocities

Defence Technology（防务技术） 2021年第1期17卷 202-211页

作者： Chahmi Oucif J.S.Kalyana Rama K.Shankar Ram Farid Abed Institute of Structural Mechanics(ISM) Bauhaus-Universitat WeimarMarienstraße 15D-99423WeimarGermany Department of Civil Engineering BITS Pilani-Hyderabad CampusHyderabad500072India Department of Civil Engineering Vignana Bharathi Institute of TechnologyHyderabad501301India Department of Civil Engineering University of CaliforniaBerkeleyBerkeleyCAUnited States Department of Civil Engineering American University of SharjahP.O.Box 26666United Arab Emirates

This work presents a numerical simulation of ballistic penetration and high velocity impact behavior of plain and reinforced concrete *** paper is divided into two *** first part consists of numerical modeling of reinforced concrete panel penetrated with a spherical projectile using concrete damage plasticity(CDP)model,while the second part focuses on the comparison of CDP model and johnson-holmquist-2(JH-2)damage model and their ability to describe the behavior of concrete panel under impact *** first and second concrete panels have dimensions of 1500 mm1500 mm150 mm and 675 mm675 mm200 mm,respectively,and are meshed using 8-node hexahedron solid *** impact object used in the first part is a spherical projectile of 150 mm diameter,while in the second part steel projectile of a length of 152 mm is modeled as rigid *** and scabbing characteristics are studied in the first *** the second part,the comparison results are presented as damage contours,kinetic energy of projectile and internal energy of the *** results revealed a severe fracture of the panel and high kinetic energy of the projectile using CDP model comparing to the JH-2 *** addition,the internal energy of concrete using CDP model was found to be less comparing to the JH-2 model.

关键词： johnson-holmquist-2 Concrete damage plasticity Concrete panel Damage Impact loads

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Ballistic behavior of plain and reinforced concrete slabs under high velocity impact

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Frontiers of Structural and Civil Engineering 2020年第2期14卷 299-310页

作者： Chahmi OUCIF Luthfi Muhammad MAULUDI Farid Abed Institute of Structural Mechanics Bauhaus-Universitat WeimarWeimar D-99423Germany Teknik Sipil Politeknik Negeri BandungGegerkalong Hilir Ds.CiwarugaBandung 40012Indonesia Department of Civil Engineering American University of SharjahSharjah 26666United Arab Emirates

This work presents a numerical simulation of ballistic penetration and high velocity impact behavior of plain and reinforced concrete *** this paper,we focus on the comparison of the performance of the plain and reinforced concrete slabs of unconfined compressive strength 41 MPa under ballistic *** concrete slab has dimensions of 675 mm x 675 mm x 200 mm,and is meshed with 8-node hexahedron solid elements in the impact and outer *** ogive-nosed projectile is considered as rigid element that has a mass of 0.386 kg and a length of 152 *** applied velocities vary between 540 and 731 m/s.6 mm of steel reinforcement bars were used in the reinforced concrete *** constitutive material modeling of the concrete and steel reinforcement bars was performed using the johnson-holmquist-2 damage and the johnson-Cook plasticity material models,*** analysis was conducted using the commercial finite element package Abaqus/*** diameters and residual velocities obtained by the numerical model were compared with the experimental results and effect of steel reinforcement and projectile diameter were *** validation showed good agreement between the numerical and experimental *** added steel reinforcements to the concrete samples were found efficient in terms of ballistic resistance comparing to the plain concrete sample.

关键词： johnson-holmquist-2 johnson-Cook reinforced concrete damage impact loads

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